气候变化领域集成服务门户(CCPortal): Spatio-temporal variation in soil thermal conductivity during the freeze-thaw period in the permafrost of the Qinghai-Tibet Plateau in 1980-2020

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DOI	10.1016/j.scitotenv.2023.169654
	Spatio-temporal variation in soil thermal conductivity during the freeze-thaw period in the permafrost of the Qinghai-Tibet Plateau in 1980-2020
	Liu, Wenhao; Li, Ren; Wu, Tonghua; Shi, Xiaoqian; Wu, Xiaodong; Hu, Guojie; Zhao, Lin; Yao, Jimin; Wang, Dong; Xiao, Yao; Shi, Jianzong; Ma, Junjie; Wang, Shenning; Qiao, Yongping
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
卷号	913
英文摘要	The Qinghai-Tibet Plateau (QTP) has the largest amount of permafrost in the low and middle latitudes, making it highly susceptible to the effects of global warming. In particular, the degradation of permafrost can be intensified by anomalous amplified warming. To accurately model the hydrothermal dynamics of permafrost and its future trends, the accumulation of high -precision, long-term data for the soil thermal conductivity (STC) in the active layer is crucial. However, no previous research has systematically investigated the spatio-temporal variation in the STC on the QTP over an extended period. Therefore, this study aims to fill this gap using the XGBoost model to analyze the STC in the permafrost on the QTP from 1980 to 2020. The findings of this study provide some preliminary insights. First, areas with high variation in the STC between the freeze-thaw periods over the 40 years gradually migrated from the western region to the central region. Second, since 2015, STC in more than 90 % of the permafrost region in the thawing period has shown positive growth. While, during the freezing period, the STC also exhibited an increase over most regions of the QTP, though the western region and parts of the northeastern region exhibited a decrease. Third, the spatial center of gravity for the STC during the freezing and thawing periods from 1980 to 2020 shifted. The mean STC was larger in the eastern and northeastern regions during the freezing period and larger in the western region during the thawing period. Fourth, both alpine swamp meadow and alpine meadow exhibited a gradual increase in the STC during the freeze-thaw period from 1980 to 2020. The conclusions and data products from this study are expected to support spatiotemporal modeling of the permafrost on the QTP and assist in the prognosis for its future.
关键词	Soil thermal conductivity Permafrost Climate change Freeze-thaw period Qinghai-Tibet Plateau
英文关键词	ACTIVE LAYER; MODEL; REGIONS
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001154561300001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282869
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; China National Petroleum Corporation; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Liu, Wenhao,Li, Ren,Wu, Tonghua,et al. Spatio-temporal variation in soil thermal conductivity during the freeze-thaw period in the permafrost of the Qinghai-Tibet Plateau in 1980-2020[J],2024,913.
APA	Liu, Wenhao.,Li, Ren.,Wu, Tonghua.,Shi, Xiaoqian.,Wu, Xiaodong.,...&Qiao, Yongping.(2024).Spatio-temporal variation in soil thermal conductivity during the freeze-thaw period in the permafrost of the Qinghai-Tibet Plateau in 1980-2020.SCIENCE OF THE TOTAL ENVIRONMENT,913.
MLA	Liu, Wenhao,et al."Spatio-temporal variation in soil thermal conductivity during the freeze-thaw period in the permafrost of the Qinghai-Tibet Plateau in 1980-2020".SCIENCE OF THE TOTAL ENVIRONMENT 913(2024).